If you are not interested in the truth, every theory becomes a weapon to hide it. This is why instead of teaching theories you have to teach the love of truth — coincidentally that is the meaning of the word philosophy.
Maybe my standards are too low but these days I'm excited to talk to anyone who even has a passing interest in truth for its own sake, no matter what the quality of their inquiry is.
A) know ethics
B) have a love for the truth
It is harder to use ethics to lie to yourself or others. Ethics are a tool that can be used to justify heinous behaviour, or to shine a light on how your daily choices could be made better, all depending on those wielding the tool.